20551767080 has 64 divisors (see below), whose sum is σ = 50858115840. Its totient is φ = 7426881792.

The previous prime is 20551767079. The next prime is 20551767101. The reversal of 20551767080 is 8076715502.

It is a super-2 number, since 2×20551767080² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 396014 + ... + 444893.

It is an arithmetic number, because the mean of its divisors is an integer number (794658060).

Almost surely, 2^20551767080 is an apocalyptic number.

20551767080 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20551767080 is an abundant number, since it is smaller than the sum of its proper divisors (30306348760).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20551767080 is a wasteful number, since it uses less digits than its factorization.

20551767080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 840978 (or 840974 counting only the distinct ones).

The product of its (nonzero) digits is 117600, while the sum is 41.

The spelling of 20551767080 in words is "twenty billion, five hundred fifty-one million, seven hundred sixty-seven thousand, eighty".